The Manfrotto 293 is recommended if you want to support a relatively long telephoto lens - longer than about 15 cm. In addition, a non-rotatable portion of the lens has to be found as a point of support within the "reach" of the rails. Now large telephoto lenses have usually already own lens clamp - and for smaller lenses, the present holder can not use unfortunately. Therefore only 3 stars. But since there are on the market no suitable alternative, I have the part rebuilt according to my needs and I'm now fairly so clear.
